books.google.com.ph - A tiny scrap of genetic information determines our sex; it also consigns many of us to a life of disease, directs or disrupts the everyday working of our bodies, and forces women to live as genetic chimeras. The culprit--so necessary and yet the source of such upheaval--is the X chromosome, and this...http://books.google.com.ph/books/about/THE_X_IN_SEX.html?id=4zd4c1c3cQUC&utm_source=gb-gplus-shareTHE X IN SEX